I'd like to see Adobe add the MacOS system share sheet to Lightroom on desktop. Currently, it does not have the ability to use the built-in OS share sheet (allowing sharing to email, messages, other apps, added plugins, workflows that you create via Shortcuts, etc)—you can only export the file to the hard drive or use one of the built-in Adobe connections/album/link sharing. This contrasts with the mobile versions for iPadOS/iOS, where the Lightroom share button allows you to choose an export format/settings which then feeds directly into the OS share sheet.
The OS share sheet is quite useful for day-to-day sharing of photos and files, and especially nice when paired with the first step of going through Lightroom's export settings. It’d add a lot more flexibility, particularly given the ability to create your own workflows via Shortcuts.
This is somewhat related to the “Lightroom Desktop integration with Apple iCloud Photos library” idea, but they function separately in the mobile app and that idea is about full direct import/export integration. This is about the share sheet and its many options.